-   k kitchen mixing machine



y 14, 3 J. F. R. KARLSTROITA KITCHEN MIXING MACHINE Filed March 22 6, 1951 a F 1 a I JZMW Patented July 14, 1953 KITCHEN MIXING MACHINE Johan Fredrik Robert Karlstrom, Stockholm,

Sweden, assignor to Aktiebolaget Elektrolux, Stockholm, Sweden, a corporationof Sweden Application March 26, 1951, Serial No. 2 17',537 In Sweden November 22, 1947 i 11 Claims (Cl. 25985) Thisginvention relates to household appliances,

and more particularly to an electrically operated kitchen appliance ordevice employed for mixing, stirring, beating, agitating or otherwise operat- Fig. 6 is a top plan view of the details illustrated in Fig. and f Fig. 7 is a fragmentary view taken at line 'I--.I of Fig. 5.

ing upon foods and similar materials. 5 Referring to the drawing, and particularly to In certain machines of this general character Fig. 1 thereof, I0 designates the hollow base 7 a receptacle or vessel, in which the beating, agi- .member or stand of a kitchen appliance of l the tating or-othertreatment of the materials takes type adapted for preparing 'food, such as by place, is rotatably supported for movement about m xing, kneading d Similar p ati s. a verticalaxis. A beater or other rotatable agiupri ht vess l or receptacle H is u bly mounttating device may be disposed within such an ed on the base ill for rotation about a vertical open top receptacle or vessel and arranged to axis. This may be accomplished, for example, be rotated with the aid of aroller which fricby providinga vertical shaft projecting upwardly tionally engages the inner surface of the rotatfrom the base land to which .the'bottom of the able vessel. In, the conventional arrangement Ves el H may be d ta ha ly p d, u Sh just described and, heretofore provided, the bein dr v n in ny uit bl manner y an l beateror agitator disposedwithin the vessel is tric motor mounted within the hollow base [0. caused to rotate in the same direction as the Such provisions for mounting and driving the vessel. vessel in the manner just described are well It is an object of the present invention to proknown in this'art and are, therefore, not shown vide an improvement in appliances of this type in detail herein, By way of example, the proin which rotating movement is imparted to the visions for driving thev ll y be a yp beater or agitator in a direction which is opposite like that shown'and described in United States to the direction of rotation of the vessel, such ette s Patent N0. 2,270,164 of G. Du Rietz and rotating movement being transmitted to the L. J. Faith-Ell, granted January 13, 1942. beater oragitator from the'rotatable vessel. Rising from the base member [0 and forming In accordance with the invention, a beater, a part of the stand is a tubular standard or post agitator, whipperor other rotatable tool, which l2 in which an arm I3 is mounted for angular is disposed within a vessel adapted to be driven movement about a vertical axis, so that a pin by an electric motor, is arranged 'to be driven I6 vertically movable in the outer free end of by a first rotatable member to which rotating the arm l3 may be positioned within the vessel movement is imparted by a second rotatable ll. Suitable resilient biasing means desirably member arranged to be driven by the vessel. In is employed to cause the arm I3 to move angularly this manner the beater or agitator is driven in in a. direction outward and away from the center a direction which is opposite'to-the direction of 0f the vessel H in order to maintain frictional rotation of the vessel whereby improved mixing contact between a driven member and a region results areattained. at the inner surface of the vessel, in a manner The above and other objects and advantages to "be describedpresently. In order to simplify of the invention will be better understood from the drawing the-res l ent means p y to the following description taken in conjunction 40 impart angular, movement t0 the arms has with the accompanying drawing forming a part not been shown, 'it being understood that such of this specification, and in which: resilient biasing arrangements are well known.

' Fig. 1 is a view in elevation of a household or By way of example and without limitation, the. kitchen appliance, partly broken away and in resilient biasing provisions may be of a type like section, embodying the invention; 7 that shown and described in the aforesaid pat- Fig. 2 is a top plan view of the appliance shown ent to Du Rietz and Faith-Ell, the disclosure of in Fig. 1; I i which-may be considered as being incorporated Fig. 3 is an enlarged vertical sectional view, in this application and to which reference may taken at line 3-3 of Figs. 2 and 4, to illustrate be made, if desired, for a detailed description details more clearly; g of the kitchen appliance. The post or standard Fig. 4 is an enlarged fragmentary top plan 12 also carries an angularly movable rod M at view of the details shown in Fig. 3; the outer tree end of which a scraper blade Ma Fig. 5is a fragmentary view in elevation of a is carried which acts against the inner surface kitchen appliance illustrating another embodiof the-vessel H to scrape off m r l ndin to ment of the invention; adhere thereto.

beater assembly to the arm [3.

' The beating device in the form shown comprises acage-like member 2'! having the upper ends of the spaced apart elements thereof welded or otherwise secured to a bushing or sleeve j 3% detachably fitted over the downwardly extending reduced diameter portion 29 of a roller Pivotally attached to the bracket. H by a pin or rivet 26 is a link 25 to. the outer free end of which is rigidly fixedia .pin; 24. Two vrollers 20 and 2! are rigidly fixed to arbushing .23 whi'chis rotatably mounted on. the; pin: 24. The lower peripheral surface of roller 2! is adapted to be held sinffrictional engagement with the periph- Fixed in an apertured poriionzofithez-brack-e latter moves angularly about the pivot at 26 after roller 20 engages the vessel ii to cause the roller 2| to move in good frictional engagement with roller 22 and impart rotating movement thereto.

When the vessel H is being driven, the frictional engagement of the roller 20 therewith also imparts, rotating-r movement to 'roller' 2 l' 'in the same direction as the rotating movement of the vessel. The frictional engagement of the rollers 2-land 22 causes the roller 22 and beater 21 associated therewith to turn and rotate in a direction which is opposite to the direction of the turning mcvement of the vessel ll, therebyef- 'iecting an. improved mixing or beating action.

the embodiment of the invention disclosed in Figs. 5,120 7 in which parts. similar to those shown anddescribed in Figs. 1 to i are referred to by the same reference numerals, a roller 35 is mnunted .on a pin Z ldarid adapted to frictionally eral surface of the roller 22.and impart. rotating.

movement to the latter. end the roller 20 is; formed with a groove 29a which is adapted tofrictionally engage the" inner portion ofthe rounded-or beaded top edge of the vessel I I whereby the latter during rotation impartsrotating movement to the roller 20'. The

Adjacent to its upper rollers 20 and 21' may be formed integrally' or formed from individual. parts tightly held together on the bushing 23..

The bracket or' holder .H isrprovided with a stop member 31', as-best, seen .inFigs. 3" and 4, which may be formed integrally therewith.

Whenrotating movement is being transmitted .to

the beater 21 duringthe-rotation'of the vessel 'H the stop 3! is held against the arm. t3 and resists the force: tending to cause the holder or bracket I! to turn QIIPlHIiGiIl'fihBrSEHIB direction as the rotating or turning movement. of the. vessel ll. Accordingly, the stop=3|"acts"against the arm l3 to maintain ther'bracketsor holder H in such a position on .pin [.6 thatthe beater-or tool 2'! is held away from theinner wall. surface of the vessel and displaced toward thecentertof the vessel, as best seen in Fig. 4'.

To place the kitchentool just describedinzoperation, the arm [-3 is firstrmanually swung toward the. center .of the vessel H .against-thetensionof the resilient biasing'provisions previously mentioned,. and the arm may then belocked: in such position by a knob 32 0f a set-screwor looking member which-passesthrough a slot formed in the post or standard. 12. The beater assembly, which includes the bracket-or .holder l1,

and beater assembly coupled thereto is urged by the resilient biasing provisions toward the side wall of'the vessel H and the groove 20a of roller 20 comes into frictionalengagement with the inner surface of the rounded top portion-cf the By carrying the roller 2.0 at-the out- 1 er free end of the angularly movable link 25:, the

vessel l I.

' 1 vessel.

engage a region of the inner surface of the vessel II. The: roller .351s formed with asperipheral edge having a groove which I receives; and trio-- tionall-y-engages arcomplementary shapedperipheral edge portion of a roller 36 mounted on a pin 28a upon which. the beater unit is rotatably mounted. In theembodiment of Figs; 5 to 7 the bushing i 8 shown in'Figsl to 4 is omitted and thealowe'r end cf the pin l6 extends-downward through two coaxial openings 31- formed. in overlying parts of .;the;bracket orr holder lla, as best seenin Fig. 7'. Moreover,.,the tab illlit formed at the lower end of the bracket Ila acts as a stop against which .the lower endofthe pin l6 rests in the embodimentof Figs. 5to '7 it will 1 be notedthe-pin l-fi isgnot in vertical alignment with the verticalax-is of the beater unit or assembly as in theembodiment described above. In other respects the embodiment of Figs. 5 to '7 essentially corresponds to the embodiment shown herein is in the iorm-of a beater or whipping device, it will be apparent that any other ,form of mixing, stirringor agitating element may be emi ployed. Accordinglygthe term beater is in tended to include any kitchen tool or appliance for use in kitchen or. household appliance like that described-herein. V

Inview of the foregoingcit will now be under stood that an improved arrangement has been 1 provided for operating a kitchen tool. in a vessel adapted to be driven. by an. electric motor, for example, thekitchen tool being driven in aidirectionoppositetothe turning movement of the Further, such turning movement. is transmitted to the kitchen tool with the aid. of

' a rotatable element to which rotating movement is imparted only from the. vessel and from which rotating movement is. transmitted to a, driven. member associated with the kitchen tool. ,The bracket ll inIFigs. 1 to .4.and bracket llain Figs,

'5'to '7 constitute. supports for .the kitchen tool which are-formed toreceive thelower end of the axially movable pin lr'o wh-ichlis disposed essentially parallel toathe vertical axisof rotation of the vessel ll. The lower part ll) .of the'bracket ll and tab portion I9a of the bracket Ila serveas stopstojlimit theextent of downward movement of -the pinlfi and maintain the kitchen-tool or beater assembly at the correct height.

Since thearm. .13 is spring biased to urge the arm in an upward directionin Figs. 4 and 6, that is, cause the :arm tomove angularly through-an arc-toward the side wall of the vessel H when the knob 32 is loosened, it -will. be=seen that: the

arm acts against the-stops a lfwhich are located between the armfand'the sidewall of the vessel.

Hence, the spring biased 'ar'm I3 urgesthe'roller 20 in Figs. 1 to 4 and roller 35 in Figs. 5 to "7 'in good frictional contact with the top rounded bead at the 'top edgerof thejvesselfi Theroller 20 is located atithe' outer end of a link 25 which is angularly movable about the pivot 26' while thefroller 35 .is locatedat the outer end "of a' link 25a angularly' movable about the'pivot 26a.-

The links 25 and 25a are located on' the holders or supports i1 and Ila sothat the 'frictioni'novement developed during rotation effects the frictional engagement between rollers 21 and 22 in Figs. 1 to 4 and between rollers 35rand35 Figs.

In the claims the terms second friction roller" j and secondroller are employed tofdesignate the single roller in Fig. 3 which serves asthe roller and also as the roller 2|; and to desig nate the single roller 35 in Fig. 5. Since the rollers 20 and 2| in Fig. 3 may comprise sepa rate roller elements or parts which are not necessarily united directly to one another, it is to be understood that the term second friction roller and any equivalentexpression employed in the claims is intended to cover a singleroller unit like that shown fixed to pin 24 in Fig. 3 and also several friction roller parts fixed to such a pin in which one roller part is adapted to frictionally engage the vessel and the other roller part is adapted to frictionally engage the roller for drivingthe beatercage 21.

' While I have shown several embodiments of my invention, I do not wish to be limited to the particular constructions set forth, and'I intend in the following claims to cover all changes and,

and scope of my invention.

What is claimed is: 1. In combination with a food mixing modifications which'do not depart from the spirit about which the vessel rotates and upon which said holder is rotatably mounted, a driven member fixed to and rotatable with said tool, mechanism for operating said kitchen tool comprising a rotatable element to which rotating movement is imparted only from the vessel and from which rotating movement is transmitted to said driven member, means for supporting said driven member and rotatable element on said holder, and means including a part fixed to said holder and cooperating with the stand which prevents any tendency of said holder to turn on said pin in the direction of rotation of said vessel.

2. The combination set forth inclaim 1 in which said supporting means for said rotatable element comprises structure which enables such element to be moved angularly with respect to said holder.

3. In combination with a food mixing machine or like device having a stand including an angularly movable arm and an open top vessel which is adapted to be mounted for rotation on the stand about a vertical axis, such machine having provisions for driving the vessel, of a rotatmachine or like device having a stand and an open top 6 thevessel including a pin carried by said arm which is substantially parallel to the axis about which the vessel rotates and upon which said holder is rotatably supported, a driven member fixed to and rotatable with said tool, mechanism' for operating said kitchen tool comprising a rotatable element to which rotating movement is imparted only from thevessel and from which rotatingmovement is transmitted to said driven member, means for supporting said driven member and rotatable element 'on said holder, and I means including a part fixedfito said holder and arranged to actlagainst said'arm to 'prevent'any, tendency of said holder to turn-on said pinin V the direction of rotation of the vessel.

4."In combination with a food mixing machine or like device having an open top vessel which is adapted to be mounted for rotation about a. vertical axis, such machine having provisions-for driving thevessel, of a unit comprising a rotatable kitchen tool, structure for supporting said unit within the vessel, said structure being operable to move said unit in a path'of movement within the vessel, mechanism for operating said kitchen tool, said mechanism including a driven member carried by said unit for driving said tool, a part carried by said unit and movable thereon, and an element mounted on said part for rotation thereon, said part being positioned on said unit to cause said rotatable element to transmit" rotating movement to said driven memher when rotating movement is imparted to said element from the vessel upon movement of said unit in one direction in its path of movement within the vessel. I

5. In combination with a food mixing machine or like device having an open top vessel which is adapted to be mounted for rotation about a vertical axis, such machine having means for positively driving the vessel, of a unit compris ing a rotatable kitchen tool, structure for supporting said unit within the vessel for movement about a vertical axis, said structure being op erable to move said unit bodily in a path of movement within the vessel, mechanism for operati'ng said kitchen tool, saidmechanism including a first friction roller carried by said unit for driving said tool, a part carried by said unit and movable thereon, and a second friction roller mounted on said part for rotation thereon, said partbeing positioned on said unit to cause said second roller to frictionally engage said first roller when said second roller is brought into frictional engagement with the vessel upon movement of said unit in one direction in. its path of movement within the vessel.

6. In combination with a food mixing machine or-like device having an open top vessel which is adapted to be mounted for rotation about a vertical axis, such machine having means for positively driving the vessel, of a unit comprising a rotatable kitchen tool, structure forrotatably supporting said unit within thevessel, said structure comprising a member rotatable about a vertical axis disposed exteriorly of the vessel for moving said unit bodily in a path of movement within the vessel, mechanism for operating said kitchen tool, said mechanism including a first friction roller carried by said unit which is fixed to and rotatable with said tool, a part pivoted on said unit and movable thereon, and a second friction roller mounted on said part for rotation thereon, said part being pivoted on said able kitchen tool, a holder for said tool, strucunit to cause said second roller to frictionally engage said first roller when said second roller isibrought a-intosfrictional engagement with the;

vesselupon movement of said unit in one. direc- V tion-in'rits path of movement=within the vessel;

73in combination witha foodmixing machine or lilie device havingan .open top vessel which. is :-adapted to-:be-mounted for rotation about a verticalzaxis; such machine havingmeans for positively driving the vesse1 ,.;.of a kitchen tool,

such as a beater, for-example, supporting means for positioning:.-such:.tool in the vessel, said supporting means being. operable tofimove :said' tool.

bodily in: one direction-in an arcuate path: of movement. toward an upright wall of the. vessel, mechanism for operating said tool, said mechanism including. a: first ir otatable member on said supporting means for driving said tool, :a parton saidisupporltingmeanswhich .is movable thereon, and :a second rotatable member mounted ionfsaid part .for rotation thereon, said part being position'ed onwsa-id supporting meansto cause-said second rotatable member .to. transmit rotatingmovement to said first rotatable member .for

driving, said tool-whenrotating movement is imparted to said second rotat'able member from thevessel upon movement of said tool in said one direction toward the upright wall of'the vessel.

8. In combination with a food mixing machine or like device having an open .top vessel, which is adapted to be mounted for rotation aboutavertical aids, such machine having. means for positively driving the vessel, of a kitchen tool, such as a beat-er, for-example, supporting means about an axis-movable with respect tosaid hold-- er, said last-mentioned mountingmean-s being operable to cause said second rotatable element to transmit rotating movement to said first rotatable element to drive .saidtool when: rotating movement is imparted; to said second rotat able element from the vessel upon movement ofsaid tool in one direction in its path of'movement within the vessel.

9.- In'combinationwitha food mixingmachine or like device having an-open top vessel which 7 is adapted to be mounted .for rotation about a vertical axis, suchmachine' havingmeansefor positively driving the vessel, of a rotatable kitchen-tool including a holder, structure cooperating withsaid holder for rotatably supportingi saidr-tool -within. the vessel, such structure 1 enablingsai'dtool tobe moved angularly'through an arc-in a path of;movement toward and from the upright wall? 10f the vessel, a first friction roller carriedaby said holder which is fixed to-- and rotatable ywithlsaid tool, mechanism separate from the-driving means for. the vessel for operating 'saidkitch enrtool, said mechanism comprising; an elementipivoted-on said holder anda second-.friction roller rotatably mounted on-such 7 element which: is. arranged to frictionally engage the: vessel and said first friction roller 1in-one position of said toolinits path of movementisaid second roller-being out of. frictional contact with;

the-vesseliinanotherposition of said .tool in its path of movement while the driving means is still operable-'-to.drive the vessel, said element vertical axis disposedexteriorlyof the vessel;

be ng :positionedon .said holder to cause said second. friction roller to frictionally engage said first croller when; said second roller .is brought into frictional engagement with thevessel upon movement of said .tool to path ofzmovement; V

10. In combination witha food mixing-machine or like device having an open top vessel which is adapted to be mounted for rotation about a vertical axis, such machine having provisions for driving the vessel, -a part rotatable about a such part being angularly movablewith respect to the vessel at the vicinity of the opening thereof, and an upright pin which is vertically movable on the part and in its lower position -extends into theinterior of the vessel when the part is disposedabovethe vessel, of unitary structune com-prising asholder and a rotatable. kitchen tooLj ournaled; forsrotationv on said holder, means including said holder for removably supporting said structure on the pinto position the latter within the vessel, and said holder being apertured. to receive thelower end of the .pin and having. a stop -.to limitdownward.vertical move-v ment thereof, .said .holder havin-gone part there of employed to journal said kitchen tool and another part thereof formed to. receive the pin.

.11. The combination .set torth in claim 10 in whichsaid holder incl'udesa hollow sleeve mem-.-

ber to provide the aperture which receivesthe pin,.saicl sleeve member. being locatedabove-said stop,

JOHAN FREDRIK.ROBERT KARLSTRO-M. I

References Cited in the file of this patent UNITED"STATES PATENTS Date Number Name 1,714,359 Gambon May 21, 1929 1,898,986 Fitzgerald Feb. 21, 1933 2,270,164 Du Rietz et a1. Jan. 13, 1942 said one position in its 

